Home / 1,287,540.30-1,931,569.65-445,917.90

Finding the Fourth Proportional to 1,287,540.30, 1,931,569.65 and 445,917.90

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Solution

The fourth proportional to 1,287,540.30, 1,931,569.65 and 445,917.90 is: 668,966.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,287,540.30 : 1,931,569.65 = 445,917.90 : x
  2. Step 2: Convert to fraction form
    1,287,540.30/1,931,569.65 = 445,917.90/x
  3. Step 3: Cross multiply
    1,287,540.30x = 1,931,569.65 × 445,917.90
  4. Step 4: Simplify right side
    1,287,540.30x = 861,321,482,031.74
  5. Step 5: Solve for x
    x = 861,321,482,031.74/1,287,540.30
  6. Step 6: Final answer
    x = 668,966.62

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.